/* ==========================================================================
   Network Tools — Design System
   Palette: deep ink navy + electric cyan, built around a "live network"
   metaphor (nodes, links, signal). Data (IPs, ports, credentials) is set
   in a mono face because it IS data, not decoration.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root{
  /* --- Color: 6 named hex values --- */
  --ink:        #0A0E1A;   /* page background */
  --surface:    #101728;   /* card / panel background */
  --surface-2:  #16203A;   /* raised panel / hover */
  --line:       #223055;   /* hairline borders on dark */
  --cyan:       #33E6D8;   /* primary accent — signal / active */
  --blue:       #4E7CFF;   /* secondary accent — links, brand */
  --text:       #E7ECFA;   /* primary text on dark */
  --text-dim:   #93A0C2;   /* secondary text on dark */
  --text-faint: #5B6789;   /* tertiary / meta text */
  --ok:         #35D07F;
  --warn:       #F5B942;
  --danger:     #FF6B6B;
  --on-cyan:    #04211E;   /* text color when sitting on cyan */

  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;

  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;
  --container: 1180px;
  --gap: 24px;

  --shadow-panel: 0 1px 0 rgba(255,255,255,.04) inset, 0 20px 40px -24px rgba(0,0,0,.6);
}

/* --- Reset --- */
*, *::before, *::after{ box-sizing: border-box; }
html{ -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  background-image:
    radial-gradient(60rem 30rem at 85% -10%, rgba(78,124,255,.16), transparent 60%),
    radial-gradient(50rem 26rem at -10% 10%, rgba(51,230,216,.10), transparent 60%);
  background-attachment: fixed;
}
img{ max-width: 100%; display: block; }
a{ color: var(--cyan); text-decoration: none; }
a:hover{ text-decoration: underline; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight: 600; line-height: 1.15; margin: 0 0 .5em; color: #fff; letter-spacing: -0.01em; }
h1{ font-size: clamp(2rem, 1.4rem + 2.4vw, 3.4rem); }
h2{ font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.2rem); }
h3{ font-size: 1.25rem; }
p{ margin: 0 0 1em; max-width: 68ch; color: var(--text-dim); }
code, .mono{ font-family: var(--font-mono); }
ul{ padding-left: 1.2em; }

:focus-visible{ outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 4px; }
@media (prefers-reduced-motion: reduce){ *{ animation-duration: .001ms !important; transition-duration: .001ms !important; scroll-behavior: auto !important; } }

.container{ max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section{ padding: 64px 0; }
.section-head{ display:flex; align-items:flex-end; justify-content:space-between; gap: 16px; margin-bottom: 28px; flex-wrap: wrap; }
.section-head p{ margin: 0; }
.eyebrow{ color: var(--cyan); font-size: .82rem; font-weight: 600; margin: 0 0 10px; }

/* --- Buttons / inputs --- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding: 11px 20px; border-radius: 999px; font-weight: 600; font-size: .95rem;
  border: 1px solid transparent; cursor: pointer; font-family: var(--font-body);
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn:hover{ text-decoration: none; transform: translateY(-1px); }
.btn-primary{ background: var(--cyan); color: var(--on-cyan); }
.btn-primary:hover{ background: #4ff0e3; }
.btn-ghost{ background: transparent; color: var(--text); border-color: var(--line); }
.btn-ghost:hover{ border-color: var(--cyan); color: var(--cyan); }
.btn[disabled]{ opacity:.5; cursor:not-allowed; transform:none; }

input, select, textarea{
  width: 100%; background: var(--ink); border: 1px solid var(--line); color: var(--text);
  padding: 12px 14px; border-radius: var(--radius-s); font-family: var(--font-mono); font-size: .95rem;
}
input:focus, select:focus, textarea:focus{ border-color: var(--cyan); }
label{ display:block; font-size: .82rem; color: var(--text-dim); margin-bottom: 6px; font-family: var(--font-body); }
.field{ margin-bottom: 16px; }
.field-row{ display:flex; gap: 12px; flex-wrap: wrap; }
.field-row > .field{ flex: 1 1 160px; }

/* --- Header / nav --- */
.site-header{ position: sticky; top:0; z-index: 40; backdrop-filter: blur(10px); background: rgba(10,14,26,.78); border-bottom: 1px solid var(--line); }
.site-header .container{ display:flex; align-items:center; gap: 28px; height: 74px; }
.brand{ display:flex; align-items:center; gap:10px; font-family: var(--font-display); font-weight:700; color:#fff; font-size:1.15rem; margin-right:auto; }
.brand:hover{ text-decoration:none; }
.brand-mark{ width: 30px; height:30px; border-radius: 8px; background: linear-gradient(135deg, var(--cyan), var(--blue)); flex: none; }
.primary-nav{ display:flex; align-items:center; gap: 4px; }
.primary-nav ul{ display:flex; list-style:none; margin:0; padding:0; gap: 2px; }
.primary-nav > ul > li{ position:relative; }
.primary-nav a{ color: var(--text-dim); font-weight: 500; font-size:.92rem; padding: 10px 14px; border-radius: 999px; display:block; }
.primary-nav a:hover{ color:#fff; background: var(--surface-2); text-decoration:none; }
.primary-nav .sub-menu{ display:none; position:absolute; top: 100%; left:0; background: var(--surface); border:1px solid var(--line); border-radius: var(--radius-m); padding: 8px; min-width: 220px; box-shadow: var(--shadow-panel); }
.primary-nav li:hover > .sub-menu{ display:block; }
.primary-nav .sub-menu a{ padding: 9px 12px; border-radius: 8px; }
.menu-toggle{ display:none; background:none; border:1px solid var(--line); color:#fff; border-radius:8px; padding:8px 10px; }

/* --- Hero --- */
.hero{ padding: 72px 0 40px; position: relative; overflow:hidden; }
.hero-grid{ display:grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items:center; }
.hero h1{ max-width: 14ch; }
.hero-lede{ font-size: 1.08rem; max-width: 46ch; }
.status-pill{ display:inline-flex; align-items:center; gap:8px; font-family: var(--font-mono); font-size:.8rem; color: var(--ok); background: rgba(53,208,127,.1); border:1px solid rgba(53,208,127,.35); padding: 6px 12px; border-radius: 999px; margin-bottom: 18px; }
.status-dot{ width:7px; height:7px; border-radius:50%; background: var(--ok); box-shadow: 0 0 0 3px rgba(53,208,127,.25); }

.net-diagram{ position:relative; aspect-ratio: 1/1; max-width: 440px; margin: 0 auto; }
.net-diagram svg{ width:100%; height:100%; }
.net-diagram .node{ fill: var(--surface-2); stroke: var(--line); }
.net-diagram .node.active{ fill: var(--cyan); }
.net-diagram .link{ stroke: var(--line); stroke-width:1.5; }
.net-diagram .link.live{ stroke: var(--cyan); stroke-dasharray: 4 5; animation: dash 6s linear infinite; }
@keyframes dash{ to{ stroke-dashoffset: -100; } }

/* --- Quick lookup / readout panel (used by IP tools) --- */
.readout{ background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-l); padding: 28px; box-shadow: var(--shadow-panel); }
.readout-row{ display:flex; align-items:baseline; justify-content:space-between; padding: 12px 0; border-bottom: 1px dashed var(--line); gap: 16px; }
.readout-row:last-child{ border-bottom:none; }
.readout-row .k{ color: var(--text-dim); font-size:.88rem; }
.readout-row .v{ font-family: var(--font-mono); color:#fff; font-size: 1rem; text-align:right; word-break: break-word; }
.readout-hero-value{ font-family: var(--font-mono); font-size: clamp(1.8rem, 1.4rem + 1.6vw, 2.6rem); color: var(--cyan); font-weight:600; letter-spacing:-0.02em; }
.copy-btn{ background: var(--surface-2); border:1px solid var(--line); color: var(--text-dim); border-radius:8px; padding:6px 10px; font-size:.78rem; cursor:pointer; font-family: var(--font-body); }
.copy-btn:hover{ color:#fff; border-color: var(--cyan); }

/* --- Cards / grids --- */
.grid{ display:grid; gap: var(--gap); }
.grid-3{ grid-template-columns: repeat(3, 1fr); }
.grid-4{ grid-template-columns: repeat(4, 1fr); }
.grid-2{ grid-template-columns: repeat(2, 1fr); }

.card{ background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-m); padding: 22px; transition: border-color .15s ease, transform .15s ease; }
.card:hover{ border-color: rgba(51,230,216,.4); }
.card h3{ margin-bottom: 6px; }
.card h3 a{ color:#fff; }
.card h3 a:hover{ color: var(--cyan); text-decoration:none; }
.card p{ font-size: .92rem; margin-bottom: 0; }
.card .tag{ display:inline-block; font-family: var(--font-mono); font-size:.72rem; color: var(--cyan); background: rgba(51,230,216,.08); border:1px solid rgba(51,230,216,.25); padding: 3px 9px; border-radius: 999px; margin-bottom: 12px; }

.tool-card{ display:flex; flex-direction:column; gap: 10px; }
.tool-card .icon{ width:38px; height:38px; border-radius:10px; background: var(--surface-2); display:flex; align-items:center; justify-content:center; color: var(--cyan); }

.content-card{ display:flex; flex-direction:column; }
.content-card .thumb{ aspect-ratio: 16/10; border-radius: var(--radius-s); overflow:hidden; margin-bottom: 14px; background: var(--surface-2); }
.content-card .thumb img{ width:100%; height:100%; object-fit:cover; }
.content-card .kicker{ font-family: var(--font-mono); font-size:.72rem; color: var(--text-faint); margin-bottom: 6px; }

/* --- IP / brand index table --- */
.index-table{ width:100%; border-collapse: collapse; }
.index-table th{ text-align:left; font-size:.78rem; color: var(--text-faint); font-weight:500; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.index-table td{ padding: 12px 14px; border-bottom: 1px solid var(--line); font-size:.92rem; }
.index-table tr:hover{ background: var(--surface); }
.index-table .ip-val{ font-family: var(--font-mono); color:#fff; }
.index-filter{ display:flex; gap:10px; margin-bottom: 18px; flex-wrap:wrap; }
.index-filter input{ max-width: 280px; }
.alpha-jump{ display:flex; flex-wrap:wrap; gap:6px; margin-bottom: 18px; }
.alpha-jump a{ width:30px; height:30px; display:flex; align-items:center; justify-content:center; background: var(--surface); border:1px solid var(--line); border-radius:8px; color: var(--text-dim); font-size:.82rem; }
.alpha-jump a:hover{ border-color: var(--cyan); color: var(--cyan); text-decoration:none; }

/* --- Credential block --- */
.cred-box{ background: var(--ink); border:1px solid var(--line); border-radius: var(--radius-s); padding: 16px; display:grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.cred-box .cred{ }
.cred-box .k{ font-size:.72rem; color: var(--text-faint); text-transform: none; margin-bottom:4px; }
.cred-box .v{ font-family: var(--font-mono); color: var(--cyan); font-size: 1rem; }
.disclaimer{ font-size:.82rem; color: var(--text-faint); border-left: 2px solid var(--warn); padding-left: 12px; margin-top: 18px; }
.login-buttons{ display:flex; gap:10px; flex-wrap:wrap; margin: 18px 0; }
.login-buttons .btn{ font-family: var(--font-mono); }

/* --- Breadcrumbs --- */
.breadcrumbs{ font-size:.82rem; color: var(--text-faint); margin-bottom: 22px; }
.breadcrumbs a{ color: var(--text-dim); }
.breadcrumbs a:hover{ color: var(--cyan); }
.breadcrumbs .sep{ margin: 0 6px; opacity:.5; }

/* --- Article / single content --- */
.article-head{ max-width: 74ch; margin: 0 auto 32px; text-align:left; }
.article-body{ max-width: 74ch; margin: 0 auto; }
.article-body p, .article-body li{ color: var(--text-dim); }
.article-body h2{ margin-top: 1.4em; }
.article-body img{ border-radius: var(--radius-m); margin: 1.2em 0; }
.article-meta{ display:flex; gap:14px; align-items:center; color: var(--text-faint); font-size:.85rem; margin-bottom:10px; }

/* --- Related content --- */
.related{ margin-top: 56px; padding-top: 40px; border-top: 1px solid var(--line); }

/* --- Footer --- */
.site-footer{ border-top: 1px solid var(--line); margin-top: 80px; padding: 56px 0 32px; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; margin-bottom: 40px; }
.footer-grid h4{ font-size:.8rem; color: var(--text-faint); text-transform: none; margin-bottom: 14px; font-family: var(--font-body); font-weight:600; }
.footer-grid ul{ list-style:none; padding:0; margin:0; display:flex; flex-direction:column; gap:9px; }
.footer-grid a{ color: var(--text-dim); font-size:.88rem; }
.footer-grid a:hover{ color: var(--cyan); }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; padding-top: 24px; border-top: 1px solid var(--line); color: var(--text-faint); font-size:.82rem; flex-wrap:wrap; gap:10px; }
.lang-switch{ display:flex; gap:8px; flex-wrap:wrap; }
.lang-switch a{ border:1px solid var(--line); border-radius:6px; padding:3px 8px; font-family: var(--font-mono); font-size:.72rem; }

/* --- Pagination --- */
.pagination{ display:flex; gap:8px; justify-content:center; margin-top: 40px; }
.pagination a, .pagination span{ min-width:38px; height:38px; display:flex; align-items:center; justify-content:center; border:1px solid var(--line); border-radius:8px; color: var(--text-dim); font-size:.88rem; }
.pagination .current{ background: var(--cyan); color: var(--on-cyan); border-color: var(--cyan); font-weight:600; }
.pagination a:hover{ border-color: var(--cyan); color: var(--cyan); text-decoration:none; }

/* --- Utility --- */
.text-center{ text-align:center; }
.mt-0{ margin-top:0; } .mb-0{ margin-bottom:0; }
.badge{ display:inline-flex; align-items:center; gap:6px; font-size:.78rem; padding: 4px 10px; border-radius:999px; font-family: var(--font-mono); }
.badge-ok{ color: var(--ok); background: rgba(53,208,127,.1); border:1px solid rgba(53,208,127,.3); }
.badge-warn{ color: var(--warn); background: rgba(245,185,66,.1); border:1px solid rgba(245,185,66,.3); }
.badge-danger{ color: var(--danger); background: rgba(255,107,107,.1); border:1px solid rgba(255,107,107,.3); }
.spinner{ width:16px; height:16px; border-radius:50%; border:2px solid var(--line); border-top-color: var(--cyan); animation: spin .7s linear infinite; display:inline-block; }
@keyframes spin{ to{ transform: rotate(360deg); } }
.skip-link{ position:absolute; left:-999px; top:0; background:var(--cyan); color:var(--on-cyan); padding:10px 16px; z-index:100; }
.skip-link:focus{ left: 12px; top:12px; }

/* --- Responsive --- */
@media (max-width: 980px){
  .grid-4{ grid-template-columns: repeat(2,1fr); }
  .grid-3{ grid-template-columns: repeat(2,1fr); }
  .footer-grid{ grid-template-columns: repeat(2,1fr); }
  .hero-grid{ grid-template-columns: 1fr; }
  .net-diagram{ max-width: 320px; }
}
@media (max-width: 680px){
  .primary-nav{ display:none; position:absolute; top:74px; left:0; right:0; background: var(--surface); border-bottom:1px solid var(--line); padding: 12px; }
  .primary-nav.is-open{ display:block; }
  .primary-nav ul{ flex-direction:column; }
  .primary-nav .sub-menu{ position:static; display:block; border:none; background:none; padding-left:12px; box-shadow:none; }
  .menu-toggle{ display:inline-flex; }
  .grid-4, .grid-3, .grid-2{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .cred-box{ grid-template-columns: 1fr; }
  .index-table{ font-size:.85rem; }
}